December 26, 2022, 4:33pm
Hello, I should compare experimental data with MC simulation.
I wrote the macro and I got this plot (no-normalized)
Then I normalized the graph, by using for the MC:
and for the experimental data
but running the macro I get this plot
As you can see, it normalizes the graphs, but the quality of the image is very low, there isn’t the filling color
detdraw.c (2.8 KB)
The easiest solution would be (after scaling them):
hSim0->Sumw2(kFALSE); hExp0->Sumw2(kFALSE); c01->Modified(); c01->Update();
December 26, 2022, 6:21pm
@Wile_E_Coyote it woks but looking th two graphs I notice that one of them (the first one) has a noticeble difference between MC and data…I would check if it depends on the binning.
For the MC data are stored in a TTree then I can set the binning
TString hString0 = TString::Format("Edep>> htemp0(7010, 0, 7010.)");
but experimental data were stored in histogram, then the binning was preset and I just get the plot
TH1F *hExp0 = (TH1F *)g->Get("GePD");
is it possible to rebin it?
The easiest solution would be to first get the old “
GePD” histogram and then use its “nbins”, “xmin”, and “xmax” to create the new “
htemp0” histogram, e.g.:
gROOT->cd(); // newly created histograms should go here
TH1F *hExp0 = (TH1F*)g->Get("GePD");
TH1F *hSim0 = (TH1F*)hExp0->Clone("htemp0"); hSim0->Reset("M");
TString hString0 = TString::Format("Edep >> htemp0"); t0->Draw(hString0);
December 26, 2022, 6:59pm
I tried your code, but there is still that difference in one of the detectors…
maybe there is really this difference and we have to check the reason
January 9, 2023, 6:59pm
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